Sarah Michelle Gellar has revealed her husband Freddie Prinze Jr is loving life as a stay at home dad.

The couple have a two-year-old daughter, Charlotte, and Scooby Doo star Freddie stays at home with her while his wife works on her TV series, Ringer.

She said: "When Charlotte was born, Freddie was on 24 and I didn't work for two years. I had asked him, 'When I'm ready to go back to work, will you stay home with her then?' He was like, 'Fine!'

"He loves it. I think I've created a monster!"

The actress has two roles on the series because she plays identical twins, and she is also an executive producer.

But she revealed she doesn't work as many hours as she did when she starred on Buffy The Vampire Slayer.

"I work shorter hours on this show - everybody does - than I did on Buffy," she said.

The 34-year-old said her added responsibilities as producer reduce rather than increase the burden.

"I don't have to waste time worrying about what they're doing with my character and my story line. I get to make the show I want to make," she said.

"And since I'm on-set most of the time, if there's a decision that has to be made while we're shooting, I can make it, as opposed to calling upstairs. So I can help keep things moving along."